Airplanes back in the air

An airplane flies over Heathrow Airport in London, England. Airlines are beginning to resume a normal service following six days of airport closures due to a cloud of volcanic ash from Iceland shutting down British airspace. (Photo by Oli Scarff/Getty Images)

An airplane flies over Heathrow Airport in London, England. Airlines are beginning to resume a normal service following six days of airport closures due to a cloud of volcanic ash from Iceland shutting down British airspace. (Photo by Oli Scarff/Getty Images)

An airplane flies over Heathrow Airport in London, England. Airlines are beginning to resume a normal service following six days of airport closures due to a cloud of volcanic ash from Iceland shutting down British airspace. (Photo by Oli Scarff/Getty Images)